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通过渤海经济无脊椎动物的种类组成、生态特点、数量季节变动、洄游与分布的分析研究,发现该海区的无脊椎动物主要是常见的亚热带暖水性种类。按其生态习性,可分为3种类型:1.常年定居于渤海的种类;2.夏季移向深水区的种类;3.行长距离洄游的种类。无脊椎动物的网获量随季节变化波动较大,冬季1月份网获量最低,夏秋季8、9月份为全年网获量的高峰期。
Based on the analysis of the species composition, ecological characteristics, seasonal variations, migration and distribution of economic invertebrates in the Bohai Sea, it is found that invertebrates in the sea area are mainly common subtropical warm water species. According to their ecological habits, they can be divided into three types: 1. Types of perennial settlements in the Bohai Sea; 2. Species that migrate to deep-water areas in summer; 3. Species of long-range migrants. The amount of invertebrate net fluctuations fluctuated greatly with the seasons. The net harvest in winter was the lowest in January, and the peak in the annual net harvest in August and September in summer and autumn.